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Method and apparatus for a digital phased array antenna

  • US 6,693,590 B1
  • Filed: 01/05/2000
  • Issued: 02/17/2004
  • Est. Priority Date: 05/10/1999
  • Status: Expired due to Term
First Claim
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1. An apparatus, comprising:

  • an array antenna having a plurality of spaced antenna elements for receiving an incoming electromagnetic signal;

    a plurality of analog-to-digital converters each having an input and an output, said input of each said analog-to-digital converter being coupled to a respective said antenna element for receiving therefrom a respective analog signal, and each said analog-to-digital converter producing at said output thereof a respective digital signal representative of said analog signal at said input thereof;

    structure responsive to said digital signals from said analog-to-digital converters for producing adjusted digital signals in a manner which includes utilizing respective time delays in regard to the respective digital signals from said analog-to-digital converters so as to compensate for said electromagnetic signal reaching respective said antenna elements at respective different points in time; and

    structure for combining said adjusted digital signals into a composite digital signal, wherein said structure for producing said adjusted digital signals includes a plurality of demodulators which each convolve a respective said digital signal from a respective said analog-to-digital converter with a respective digital reference signal.

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